/Engine/Plugins/Experimental/PCG/Source/PCG/Public/Metadata/PCGAttributePropertySelector.h
To support previously saved nodes, that usedFPCGAttributePropertySelector, we need to define this function to de-serialize the new class using the old. And add a trait (see below).
bool SerializeFromMismatchedTag ( const struct [FPropertyTag](API\Runtime\CoreUObject\UObject\FPropertyTag) & Tag, [FStructuredArchive::FSlot](API\Runtime\Core\Serialization\FStructuredArchive\FSlot) Slot )